Nut-lock



(No Modem J. H. HUBER 8v G. M. ERVIN.

NUT LOCK.

N0. 484,204. L Patented Oct. 11,1892..

WITNEEEES. INVENIDR 5' ATI n RNE Y `'UNltTED STATES PATENT i OFFICE. i

JOHN H. HUBER AND GEORGE M'. ERVIN, OF J OHNSTOWN PENNSYLVANIA.

LOCK.

SPECIFICATION forming part of Letters Patent No. 484,204, dated October11., 1892.

v Application filed April 18. 1892.

Ib a/ZZ whom, it may concern:

Be it known that We,` JOHN H. HUBER and GEORGE M. ERVIN, citizens of theUnited States, residing at Johnstown, in the county of Cambria and Stateof Pennsylvania, have invented a new and usefulNut-Lock; and we dohereby declare that the following is a full, clear, and exactdescription of the invention, which will enable others skilled in theart to 1o which it pertains to nlake and use the same.

The object of our inventionis to provide a cheap and effective nut-lockby means of an internal key-seat in the nut and a key for the same, suchkey having teeth for cutting a seat t5 in the screw-threads of the bolt,the key having also an elastic finger for engaging an externalprojection or depression of the nut to hold the key fronl backing.

In the accompanying drawings, Figure 1 is zo a side elevatin, partly insection, of a nut.- lock embodying our invention. Fig. 2 is an enlargedside elevation of the key detached. Figs. 3 and #t are respectively endand side elevations of the nut.

A represents the bolt, B the nut, and C the key. The bolt and nut arescrew-threaded in the usual manner, and the nut is provided with akey-seat, as at b, and with an external projection or depression,llsually a notch, as

3o at b', punched or cut out of the corner of the nut that is nextadjacent the key-seat aforesaid.

Key O is provided with teeth, as at c, and with an elasticlocking-tinger c. The teethc maybe quilesmall-in fact, are usually aboutlike the teeth of a coarse tile. In drivingthe serial No. 429,623. (Nomodel.)

but a slight seat for the key to prevent the nut from turning. Indriving in the key, whereby is effected the cutting of the seat for thekey, a clean cut is made, aswith a tile or milling-tool, during whichthe threads of the bolt are, of course, supported on either side andnext adjacent the cutting, so that the threads of the bolt are notdistorted or materially injured in the operation. The free end ot' thelocking-finger c by engaging notch b of the nut holds the key frombacking. By inserting a pointed tool between the end of the nut andfinger c the latter may be snubbed back and disengaged from the notch,and the same movement of the tool will back over, as the nut from timetotime is turned more or less in tightening the nut. Keys C, suitable forcarriage work, would be tiny afdistigure the work. By means of suitabledies and machinery these keys may be cut from sheet or thill plate steelWith about the same facility as nails are cut, and hence the initialcost of these keys are tritling and when applied as aforesaid will befound effective locks for nuts.

Whatwe claim is- A nut-lock comprising a nut having an internal key-seatextendinglengthwise thereof, sllch nut having an external notch ordepression, a key constructed to tit such key-seat, such key havingteeth for cutting a key-seat in the opposing screw-threads of the boltlengthwise the latter,such key having also an elastic locking-linger forengaging the external notch or depression of the nut, substantially asand for the purpose set forth.

JOHN H. HUBER. GEORGE M. ERVIN..

Witnesses:

WM. A. DONALDSON, W. H. MOORE.

out the key. The key may be used over and.

fairs,hardly noticeable, and hence would noty

